| Automatic steel pipe end-facing chamfering machine is the key equipment of the pipe production line, which includes head processing sector and automatic feed mechanism. This subject is about the optimization design of the automatic feed mechanism,it involves technologies such as virtual simulation and optimization, finite element analysis and optimization,mechanical design and technology and so on. It is the key project in science & technology support plan in Tian Jin—the sub-topic of automatic steel pipe end-facing chamfering machine,which has important use value and significance.In this paper, the automatic feed mechanism ofφ426 automatic steel pipe end-facing chamfering, which is a multi-bar mechanism driven by hydraulic pressure, is the prototype.The main contents are: Simulation Analysis and Optimization of the automatic feed mechanism based on ADAMS to find the best force position in the mechanisms; Design and optimization of the original moving parts of the lifting mechanism and pushing mechanism based on ANSYS parametric language. After optimal design of the finite element, the bars'minimum weights under the maximum stress state are obtained and the optimal sizes are gotten. The transformation from experiential design to theoretical design for the automatic feed mechanism is completed.By using virtual simulation and optimization, the maximum lifting load of the automatic feed mechanism is reduced by 59.9%, the maximum pushing load is reduced by 67.7%. By using the finite element parametric design and optimization, the original moving parts weight of the pushing mechanism is reduced by 34.57%, the weight of the lifting mechanism is reduced by 20.3%, which may bring following advantages.1,The big energy savings;2,Decreasing the sizes and specifications of drive system and reducing the weight;3,The material is saved and the cost is reduced;4,The transformation from experiential design to theoretical design for the automatic feed mechanism is completed.
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